When Jan. 20 falls on a Sunday, which is the case in 2013, the president is inaugurated in a private ceremony on Jan. 20, and a public inauguration follows on Jan. 21.

by John Gettings

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Until the Twentieth Amendment was ratified in 1933, Inauguration Day was held on March 4, not January 20. Although the U.S. Constitution did not mention a specific a start date for presidential terms, our founding fathers intended for the first President to assume power on the day the Constitution went into effect, March 4, 1789.

A Bumpy Start

But the first inauguration didn't occur on time. A particularly harsh winter made travel difficult for congressmen expected in New York to count votes.
The count wasn't completed until April 6, and the ceremony to swear in George Washington (who still needed time to make the trip from his home in Virginia) and John Adams didn't take place until April 30.

The System Goes Afoul

Under the system created by the Constitution and the Twelfth Amendment, a President voted out of office in November would not have to leave office until the following March while congressmen voted out in November wouldn't be required to leave office until the following December.

While this long layover may have been needed in the 18th century, improved communication and transportation shortened the time needed for electors to certify elections and for administrations to transfer power.

The 20th Amendment

The Twentieth Amendment, sometimes called the Lame Duck Amendment, was introduced to amend the Twelfth Amendment and shorten the time an outgoing President and member of Congress could be a "lame duck" -that is, a public official who continues to serve after an election and before a successor's assumption of office.

The Twentieth Amendment moved the President's start date up to Jan. 20.—two weeks after the Electoral College's votes are certified by the president of the Senate. The amendment also moved the start date for the terms of senators and representatives up to Jan. 3.

Interesting Facts:

Franklin D. Roosevelt was the last president to be inaugurated on March 4 (3/4/1933) and the first president to be inaugurated on January 20 (1/20/37).

When Inauguration Day falls on a Sunday the president-elect takes the oath privately on that day, and repeats it in a public ceremony the next day.

Ronald Reagan owns the distinction of having the coldest traditional-date (Jan. 20) Inauguration Day on record (7 degrees F in 1985) and the warmest (55 degrees F in 1981).